CN113417076A - Wormwood finishing melt-blown fabric and preparation method and application thereof - Google Patents
Wormwood finishing melt-blown fabric and preparation method and application thereof Download PDFInfo
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- CN113417076A CN113417076A CN202110697028.5A CN202110697028A CN113417076A CN 113417076 A CN113417076 A CN 113417076A CN 202110697028 A CN202110697028 A CN 202110697028A CN 113417076 A CN113417076 A CN 113417076A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/413—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties containing granules other than absorbent substances
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
- D06B1/02—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by spraying or projecting
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/20—Polyalkenes, polymers or copolymers of compounds with alkenyl groups bonded to aromatic groups
Abstract
The invention discloses a wormwood finishing meltblown fabric and a preparation method and application thereof. The wormwood finishing meltblown fabric comprises meltblown fibers, and wormwood extract particles are inlaid on the surfaces of the meltblown fibers. The wormwood finishing meltblown prepared by the method has a wormwood coloring effect and emits fragrant smell of wormwood.
Description
Technical Field
The invention relates to a wormwood finishing meltblown fabric and a preparation method and application thereof, and belongs to the technical field of meltblown fabrics.
Background
At present, the addition of the wormwood component to the melt-blown fabric is generally added before the melt spinning of raw materials, or the addition of the wormwood component in an online or offline mode after the melt-blown fabric is formed. The prior art discloses a preparation method of a wormwood bacteriostatic melt-blown non-woven material, which comprises the following steps: fully mixing the wormwood particles and the polymer master batch, feeding the mixture into a screw for heating and melting, extruding the mixture from a spinning die head through a metering pump, and receiving a curtain for forming a net through hot air drafting to obtain the wormwood bacteriostatic melt-blown nonwoven material. The wormwood antibacterial melt-blown non-woven material has the faint scent of wormwood and the efficacy of the wormwood, has the performances of diminishing inflammation, inhibiting bacteria naturally, removing peculiar smell, efficiently filtering and the like, and can be used for mask materials, air filtering materials and sanitary materials. Also, the prior art discloses a wormwood-polypropylene composite cloth, which comprises polypropylene fibers and wormwood essential oil microcapsules fixed on the surfaces of the polypropylene fibers; the wormwood essential oil microcapsule consists of an embedding agent and wormwood essential oil embedded in the embedding agent; the embedding agent is cyclodextrin or cyclodextrin derivatives. According to the prior art, the polypropylene fiber is used as a main body, and the wormwood essential oil microcapsule is fixed on the polypropylene fiber, so that the cloth with the function of slowly releasing wormwood essential oil and the high-temperature resistance can be obtained. The wormwood-polypropylene composite cloth prepared by the prior art contains wormwood essential oil, so that the cloth has the effects of resisting bacteria and soothing the nerves. The wormwood essential oil is volatile liquid and can be used only by being prepared into microcapsules, the application method is to introduce dry microcapsules into hot air flow to fix the microcapsules on fibers during spinning, and the hot air flow is generally above 240 ℃ due to the requirement of a melt-blowing process, so that the microcapsules are easily carbonized when being heated, and the microcapsules can expand and break when being heated, the essential oil component can lose the effect when being leaked, and the processing difficulty is high. In addition, if the moxa is finished after being formed into the cloth, and then the electret finishing is carried out, the working procedures are undoubtedly increased, the cost is greatly improved, the main raw material of the melt-blown cloth is PP, the melt-blown cloth has strong water repellency and large surface tension, if the moxa is finished, the process can be realized only by adding some auxiliary agents, the subsequent electret finishing is influenced, the process is complex, the difficulty is large, and meanwhile, the adhesion fastness of the moxa finishing is not good.
Disclosure of Invention
In view of the above, the main purpose of the present invention is to provide a wormwood finishing meltblown fabric, and a preparation method and an application thereof.
In order to achieve the purpose, the invention provides a wormwood finishing meltblown fabric, which comprises meltblown fibers, wherein a plurality of wormwood extract particles are fixedly arranged on the surface of the meltblown fibers.
Further, the gram weight of the wormwood finishing meltblown fabric is 15-70g, (the content of sodium chloride in per cubic meter of air is less than or equal to 200 mg/m) of the mixture of sodium chloride particles and air3) (ii) a When the wormwood arrangement melt-blown cloth with a quantitative of 25 +/-2 g per square meter is tested by adopting sodium chloride particles with a flow rate of 30 +/-2L/min (the number median diameter is 0.075 +/-0.020 mu m), the filtration efficiency is more than or equal to 90 percent (the testing method is a PFE method measured by a YY 0469 medical surgical mask).
In order to realize the purpose, the invention also provides a preparation method of the wormwood finishing meltblown fabric, which comprises the following steps:
1) mixing and feeding a polypropylene melt-blown material and an electret material into a melting way, and metering and conveying the mixture to a spinning die head by a metering pump;
2) extruding the molten material obtained in the step 1) from a spinneret orifice of a die head, and drafting and spinning by supersonic hot air flow; drawing into finer fiber with fineness up to 0.9 micron;
3) forming wormwood aerosol by the wormwood finishing liquid through an aerosol generating device, directionally and uniformly spraying the wormwood aerosol to the supersonic speed high-temperature fiber yarn obtained in the step 2), and colliding with the supersonic speed high-temperature fiber yarn; the wormwood finishing liquid is converted into aerosol from liquid state through the aerosol generating device, and the wormwood finishing liquid has the advantages that the surface area of the wormwood finishing liquid is greatly increased after gasification, excessive moisture is evaporated conveniently, and particles formed on the other hand can be embedded on the surface of melt-blown fibers more uniformly;
4) after the wormwood aerosol and the supersonic speed high-temperature fiber are collided, the water body part volatilizes at high temperature, the rest wormwood extract particles are embedded on the fiber to form wormwood melt-blown fiber, and finally, wormwood finishing melt-blown cloth is formed in a web forming curtain; the granular wormwood extract is arranged on the melt-blown fiber in a physical combination mode, so that the melt-blown cloth has excellent wormwood performance, and the product performance is improved;
5) carrying out electrostatic electret on the wormwood finishing meltblown fabric to obtain electret wormwood finishing meltblown fabric;
6) and (4) finishing the electret wormwood, and winding, slitting and packaging the electret wormwood melt-blown fabric.
Further, in the step 1), the weight ratio of the polypropylene melt-spraying material to the electret material is (98.7-99.8): (0.2-1.3), preferably (99.3-99.7): (0.3-0.7), preferably, the electrostatic performance of the wormwood finishing meltblown product is more stable, attenuation resistance is realized, and the filtering performance is durable; for example, under the attenuation experiment of heating at the constant temperature of 70 ℃ for 24h, the attenuation amount of the filtration efficiency of the wormwood finishing meltblown fabric product is controlled within 3%.
Further, in step 1), the delivery rate of the metering pump is 600-.
Further, in the step 2), the temperature of the supersonic hot air flow is 230-.
Further, in the step 3), the content of the wormwood extract in the wormwood finishing liquid is 0.1-5 wt%, and the balance is water; preferably, the content of the wormwood extract in the wormwood finishing liquid is 0.2-2%, and the balance is water, so that the wormwood finishing liquid has good antibacterial resistance, appropriate smell and effective cost control after being optimized; wherein the wormwood extract is preferably a mature wormwood extract for more than two years, so that harmful volatile substances are fully discharged after preference, and the smell is soft; the preferred mugwort species is mugwort, because mugwort is superior in quality to other mugwort, and its main effective ingredients include: chlorogenic acid, content 0.5-0.8 wt%; jaceosidin in an amount of 0.01-0.03 wt%; eupatilin, the content is 0.07-0.1 wt%; naringin, content 0.35-0.65 wt%, is commercially available at the market of the commercial agency. The particle diameter of the wormwood extract is below 800 nanometers, and the particles are too large, so that the wormwood extract is not beneficial to preparation of finishing liquid and capture by melt-blown fibers, and the wormwood extract has the effects of antibiosis, bacteriostasis and the like.
Further, in the step 3), the air pressure of the aerosol generating device is 2-8bar, and the aerosol concentration is 0.5-5g/m3The spraying amount of the aerosol is 2-15g/s.m, so that the wormwood aerosol is uniformly arranged on the melt-blown cloth; preferably, the air pressure of the aerosol generating device is 4-6bar, and the aerosol concentration is 0.5-3g/m3The aerosol spraying amount is 5-12g/s.m, the preferable coloring effect is better, the aroma of the wormwood is appropriate, and the uniformity of the fibers is good after finishing; the particle size of the wormwood aerosol is 1-10 μm.
Further, in step 3), the nozzles of the aerosol generating device are horizontally arranged on one side or two sides of the melt-blown spun fibers, so that the wormwood aerosol and the melt-blown spun fibers are in a vertical state (the wormwood aerosol is sprayed to the melt-blown spun fibers in the vertical direction along the horizontal direction), then the wormwood aerosol is contacted with the melt-blown spun fibers in the molten state and embedded on the surfaces of the melt-blown spun fibers, water is evaporated after the liquid particles are contacted, the rest wormwood extract components are also embedded on the surfaces of the melt-blown spun fibers, and finally the wormwood aerosol is cooled to form a web for shaping.
Further, in the step 3), the horizontal distance from the nozzle of the aerosol generating device to the melt-blown spinning fiber is 5-20cm, the distance from the nozzle of the die head to the vertical direction is 3-15cm, preferably, the horizontal distance from the nozzle of the aerosol generating device to the melt-blown spinning fiber is 8-15cm, and the distance from the nozzle of the die head to the vertical direction is 6-12cm, so that the aim of ensuring uniform arrangement of the wormwood aerosol on the melt-blown cloth is preferably fulfilled.
Further, in step 4), the capturing specifically includes: after the melt-blown mixture in a molten state is extruded from a spinneret orifice of a die head, the melt-blown mixture is drawn by hot air flow and vertically blown to a receiving curtain, vertical fibers are still in a molten state between the die head and the receiving curtain, wormwood aerosol particles in the horizontal direction are sprayed to the fibers and are contacted with the fibers, the wormwood aerosol particles are captured by viscous fiber filaments, and the fibers are fixed on the fibers after being cooled and shaped.
Further, in the step 5), the temperature of the water body volatilization is 200-.
Further, in the step 5), the electrostatic electret is a corona electret or a water friction electret, preferably the corona electret, so that the cost of the corona electret is lower, and the product filtering efficiency basically meets the requirements of the medical surgical mask. According to the application of the product, electrostatic electret can be omitted, and some products do not require very high filtering efficiency, namely electrostatic electret is omitted, so that the cost is controlled. Or other uses such as wipes or dressings, without having to perform electrostatic electret. The electrostatic electret can greatly improve the electrostatic quantity of products, improve the electrostatic adsorption capacity of the products, improve the interception efficiency of the products, namely improve the filtering performance, and has better protection effect when being used as a mask filtering core layer. The voltage of the electrostatic electret is 15-50kv, preferably 20-40kv, preferably the back charge is large, and the surface electrostatic voltage is more than 200 v.
Further, in the step 6), the gram weight of the electret wormwood sorting melt-blown fabric is 15-70 g/square meter, and the quantitative determination is selected according to the customer requirements.
In order to achieve the purpose, the invention also provides a medical mask which comprises an inner layer, a filter core layer and an outer layer which are sequentially overlapped and sewn, wherein the filter core layer is made of the wormwood finishing meltblown fabric.
In order to achieve the purpose, the invention also provides an industrial filter material which is prepared from the wormwood finishing meltblown fabric.
Further, the industrial filter material is a filter screen.
Compared with the prior art, the invention has the following beneficial effects:
the wormwood finishing meltblown prepared by the invention has a wormwood coloring effect, emits fragrant smell of wormwood, has better attachment fastness of wormwood, and is not easy to fall off. The wormwood finishing meltblown fabric can be used as a material of a filter core layer of a mask, when people use the mask made of wormwood finishing meltblown fabric, the mask can effectively filter out particles in air, such as dust, bacteria, viruses and the like, and the filtering efficiency can reach more than 92.4%; the effective cost of the wormwood extract in the wormwood finishing meltblown fabric is slowly released, the adsorbed bacteria are inhibited to reproduce and killed, the bacteriostasis rate of candida albicans reaches over 69.8%, the bacteriostasis rate of escherichia coli reaches over 75.6%, and the bacteriostasis rate of staphylococcus aureus reaches over 78.4%; in addition, the wormwood finishing melt-blown fabric prepared by the invention is beneficial to the health of people due to the wormwood, and is especially beneficial to asthma and cough relieving.
Drawings
FIG. 1 is a process flow diagram of the preparation method of the wormwood finishing meltblown fabric according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The following materials or reagents, unless otherwise specified, are commercially available.
Example 1
As shown in fig. 1, this embodiment provides a preparation method of a wormwood finishing meltblown fabric, which includes the following steps:
(1) mixing 99.5 wt% of polypropylene melt-blown material (sold in markets) with 0.5 wt% of electret material (sold in markets), feeding and melting, and metering and conveying to a spinning die head by a metering pump; the die temperature was 260 ℃ and the throughput of the metering pump was 27 g/s.
(2) Extruding the molten material from a spinneret orifice of a die head (the extrusion amount is 1600g/min), and drafting and spinning by supersonic hot air flow; the hot air temperature is 270 ℃ and the hot air fan frequency is 22 Hz.
(3) The folium Artemisiae Argyi finishing liquid passes through aerosol generating deviceAir pressure of 6.8bar and particle size of the generated aerosol of 1-10 μm) to form mugwort aerosol, and jetting the mugwort aerosol to high-speed fiber filaments ejected from the die head; the folium Artemisiae Argyi finishing liquid concentration is 0.2 wt% (folium Artemisiae Argyi extract content is 0.2 wt%, and water is the rest), folium Artemisiae Argyi aerosol jet amount is 2.0 g/s.m, and aerosol concentration is 2g/m3。
(4) Capturing the moxa aerosol (the horizontal distance from a nozzle of the aerosol generating device to the melt-blown spinning fiber is 10cm, and the vertical distance from the nozzle of the die head is 10cm), drafting at high temperature, cooling, drying and shaping (the drafting speed of hot air flow is 500m/s), and forming moxa arranging and melt-blown cloth in a web-forming curtain; the rotating speed of a net forming curtain negative pressure suction fan is 23Hz, the net forming speed is 39m/min, and the gram weight of the wormwood trimming melt-blown fabric is 25 g/square meter.
(5) Carrying out electrostatic electret on the wormwood finishing melt-blown cloth; the electret voltage is 30kv and the electret time is 5 s.
(6) And (5) winding, slitting and packaging the electret wormwood finishing melt-blown fabric.
Example 2
As shown in fig. 1, this embodiment provides a preparation method of a wormwood finishing meltblown fabric, which includes the following steps:
(1) mixing 99.5 wt% of polypropylene melt-blown material (sold in markets) with 0.5 wt% of electret material (sold in markets), feeding and melting, and metering and conveying to a spinning die head by a metering pump; the die temperature was 260 ℃ and the throughput of the metering pump was 27 g/s.
(2) Extruding the molten material from a spinneret orifice of a die head (the extrusion amount is 1600g/min), and drafting and spinning by supersonic hot air flow; the hot air temperature is 270 ℃ and the hot air fan frequency is 22 Hz.
(3) The wormwood finishing liquid forms wormwood aerosol through an aerosol generating device (the air pressure is 6.8bar, the particle size of the generated aerosol is 1-10 mu m), and the wormwood aerosol is directionally and uniformly sprayed to high-speed fiber filaments sprayed out of a die head; the folium Artemisiae Argyi finishing liquid concentration is 0.5 wt%, folium Artemisiae Argyi aerosol jet amount is 5.0 g/s.m, and aerosol concentration is 5g/m3。
(4) The spinning fiber captures wormwood aerosol, the wormwood aerosol is subjected to high-temperature drafting, cooling, drying and shaping, and wormwood finishing melt-blown cloth is formed in a web-forming curtain; the rotating speed of the net forming curtain negative pressure suction fan is 23Hz, the net forming speed is 39m/min, and the gram weight of the wormwood finishing melt-blown fabric is 25 g/square meter.
(5) Carrying out electrostatic electret on the wormwood finishing melt-blown cloth; the electret voltage is 30kv and the electret time is 5 s.
(6) And (5) winding, slitting and packaging the electret wormwood finishing melt-blown fabric.
Example 3
As shown in fig. 1, this embodiment provides a preparation method of a wormwood finishing meltblown fabric, which includes the following steps:
(1) mixing 99.5 wt% of polypropylene melt-blown material (sold in markets) with 0.5 wt% of electret material (sold in markets), feeding and melting, and metering and conveying to a spinning die head by a metering pump; the die temperature was 260 ℃ and the throughput of the metering pump was 27 g/s.
(2) Extruding the molten material from a spinneret orifice of a die head (the extrusion amount is 1600g/min), and drafting and spinning by supersonic hot air flow; the hot air temperature is 270 ℃ and the hot air fan frequency is 22 Hz.
(3) The wormwood finishing liquid forms wormwood aerosol through an aerosol generating device (the air pressure is 6.8bar, the particle size of the generated aerosol is 1-10 mu m), and the wormwood aerosol is directionally and uniformly sprayed to high-speed fiber filaments sprayed out of a die head; the folium Artemisiae Argyi finishing liquid concentration is 0.5%, folium Artemisiae Argyi aerosol ejection amount is 15.0 g/s.m, and aerosol concentration is 8g/m3。
(4) The spinning fiber captures wormwood aerosol, the wormwood aerosol is subjected to high-temperature drafting, cooling, drying and shaping, and wormwood finishing melt-blown cloth is formed in a web-forming curtain; the rotating speed of the net forming curtain negative pressure suction fan is 23Hz, the net forming speed is 39m/min, and the gram weight of the wormwood finishing melt-blown fabric is 25 g/square meter.
(5) Carrying out electrostatic electret on the wormwood finishing melt-blown cloth; the electret voltage is 30kv and the electret time is 5 s.
(6) And (5) winding, slitting and packaging the electret wormwood finishing melt-blown fabric.
Comparative example 1
The product prepared in comparative example 1 was a conventional melt blown product, which was not subjected to wormwood finishing, and the preparation method thereof included the steps of:
(1) mixing 99.5 wt% of polypropylene melt-blown material (sold in markets) with 0.5 wt% of electret material (sold in markets), feeding and melting, and metering and conveying to a spinning die head by a metering pump; the die temperature was 260 ℃ and the metering pump output was 27 g/s.
(2) Extruding the molten material from a spinneret orifice of a die head (the extrusion amount is 1600g/min), and drafting and spinning by supersonic hot air flow; the hot air temperature is 270 ℃ and the hot air fan frequency is 22 Hz.
(3) Forming melt-blown cloth on the fibers subjected to air flow drafting in a web-forming curtain; the rotating speed of a negative-pressure suction fan of the net forming curtain is 23Hz, the net forming speed is 39m/min, and the gram weight of the melt-blown fabric is 25 g/square meter.
(4) Carrying out electrostatic electret on the melt-blown fabric; the electret voltage is 30kv and the electret time is 5 s.
(5) And winding, cutting and packaging the electret meltblown fabric.
Comparative example 2
Comparative example 2 provides a method for preparing wormwood meltblown fabric, comprising the following steps:
(1) mixing 99.5 wt% of polypropylene melt-blown material (sold in markets) with 0.5 wt% of electret material (sold in markets), feeding and melting, and metering and conveying to a spinning die head by a metering pump; the die temperature was 260 ℃ and the throughput of the metering pump was 27 g/s.
(2) Extruding the molten material from a spinneret orifice of a die head (the extrusion amount is 1600g/min), and drafting and spinning by supersonic hot air flow; the hot air temperature is 270 ℃ and the hot air fan frequency is 22 Hz.
(3) Forming melt-blown cloth on the web-forming curtain by the fibers subjected to air flow drafting, and performing electrostatic electret on the melt-blown cloth; the electret voltage is 30kv and the electret time is 5 s.
(4) And (3) carrying out moxa finishing liquid finishing, namely finishing by adopting a dipping method, wherein the concentration of the moxa finishing liquid is 0.5%, the penetrating agent is 1%, and the balance is water, drying the melt-blown fabric after dipping finishing, wherein the drying temperature is set to 120 ℃, and the gram weight of the moxa finishing melt-blown fabric is 25.1 g/square meter.
(5) And winding, slitting and packaging the wormwood melt-blown cloth.
Comparative example 3
The comparative example provides a preparation method of wormwood meltblown, comprising the following steps:
(1) mixing 99.5 wt% of polypropylene melt-blown material (sold in markets) with 0.5 wt% of electret material (sold in markets), feeding and melting, and metering and conveying to a spinning die head by a metering pump; the die temperature was 260 ℃ and the throughput of the metering pump was 27 g/s.
(2) Extruding the molten material from a spinneret orifice of a die head (the extrusion amount is 1600g/min), and drafting and spinning by supersonic hot air flow; the hot air temperature is 270 ℃ and the hot air fan frequency is 22 Hz.
(3) The wormwood finishing liquid forms wormwood aerosol through an aerosol generating device (the air pressure is 6.8bar, the particle size of the generated aerosol is 1-10 mu m), and the wormwood aerosol is directionally and uniformly sprayed to high-speed fiber filaments sprayed out of a die head; the folium Artemisiae Argyi finishing liquid concentration is 0.5%, folium Artemisiae Argyi aerosol ejection amount is 15.0 g/s.m, and aerosol concentration is 8g/m3。
(4) The spinning fiber captures wormwood aerosol, the wormwood aerosol is subjected to high-temperature drafting, cooling, drying and shaping, and wormwood finishing melt-blown cloth is formed in a web-forming curtain; the rotating speed of the net forming curtain negative pressure suction fan is 23Hz, the net forming speed is 39m/min, and the gram weight of the wormwood finishing melt-blown fabric is 25.3 g/square meter.
(5) And winding, slitting and packaging the wormwood melt-blown cloth.
The following product performance tests were performed on the wormwood bacteriostatic meltblown fabrics prepared in examples 1 to 3 and the products prepared in comparative examples 1 to 3. The test procedure and results were as follows:
(1) quantitative gram weight test: the testing instrument is an electronic balance, and the testing method is GB/T24218.1-2009.
(2) And (3) thickness testing: the test instrument is a YG141 fabric thickness tester, and the test method is GB/T24218.2-2009.
(3) Fracture performance: the testing instrument is an electronic force machine, and the testing method is GB/T24218.3-2010.
(4) The filtration performance is as follows: the testing instrument is a TSI 8130 filtration performance testing instrument, the testing condition is 32L/min of flow, the aerosol is a mixture of sodium chloride particles and air, and the content of sodium chloride in each cubic meter of air is 20 mg.
(5) Bacteriostasis: reference GBT 20944.3-2008 evaluation of textile antibacterial properties part 3: an oscillation method.
Table 1: each performance test of the wormwood finishing meltblown fabrics prepared in examples 1-3 of the present invention and the products of comparative examples 1-3
As can be seen from the data in Table 1, the mugwort grass finished meltblown prepared according to examples 1-3 of the present invention all had the fragrance of mugwort grass, and the taste became stronger as the concentration of the finished mugwort grass was increased. From the viewpoint of breaking strength and filtering performance, the strength of the cloth is not affected after the wormwood finishing, meanwhile, the wormwood finishing meltblown cloth can be subjected to normal electrostatic electret, so that the filtering efficiency of the product can still be kept above 90%, and after the wormwood component is introduced, the antibacterial performance of the examples 1-3 is obviously superior to that of the comparative example 1 (a conventional meltblown product without wormwood finishing), for example, the antibacterial rate to candida albicans reaches above 69.8%, the antibacterial rate to escherichia coli reaches above 75.6%, and the antibacterial rate to staphylococcus aureus reaches above 78.4%. The main reason why the filtration efficiency of the meltblown fabric prepared by electret and then moxa finishing is greatly reduced in the comparative example 2 is that the electrostatic capacity of the original electret meltblown fabric is destroyed during moxa finishing, so that the electrostatic adsorption capacity is reduced, namely, the electric quantity of the meltblown fabric is attenuated, so that the filtration efficiency is reduced, and meanwhile, the moxa adhesion fastness of the meltblown fabric prepared by the method is not enough, so that the antibacterial performance is weakened. The comparative example 3 is a product without electrostatic electret, is low in filtration efficiency, is not suitable for products with high filtration efficiency requirements such as masks and the like, but has good antibacterial performance and can be used in other fields such as wiping cloth or dressing.
In addition, through experimental detection, the wormwood finishing meltblown prepared in the embodiments 1 to 3 of the invention is beneficial to human health, and is particularly beneficial to relieving asthma and cough.
The above-mentioned embodiments are merely examples provided to fully illustrate the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The wormwood finishing meltblown cloth is characterized by comprising meltblown fibers, and a plurality of wormwood extract particles are fixedly arranged on the surface of the meltblown fibers.
2. The wormwood finishing meltblown of claim 1, wherein the wormwood finishing meltblown has a grammage of 15-70 grams; the diameter of the folium Artemisiae Argyi extract granule is below 800 nm.
3. A method of preparing a wormwood-finished meltblown fabric according to claim 1 or 2, comprising the steps of:
1) mixing and feeding a polypropylene melt-blown material and an electret material into a melting way, and metering and conveying the mixture to a spinning die head by a metering pump;
2) extruding the molten material obtained in the step 1) from a spinneret orifice of a die head, and drafting and spinning by supersonic hot air flow;
3) forming wormwood aerosol by the wormwood finishing liquid through an aerosol generating device, directionally and uniformly spraying the wormwood aerosol to the supersonic speed high-temperature fiber yarn in the step 2), and colliding with the supersonic speed high-temperature fiber yarn;
4) the wormwood aerosol and the supersonic speed high-temperature fiber collide to form wormwood melt-blown fiber, and finally, wormwood finishing melt-blown cloth is formed in a net forming curtain;
5) carrying out electrostatic electret on the wormwood finishing meltblown fabric to obtain electret wormwood finishing meltblown fabric;
6) and (4) finishing the electret wormwood, and winding, slitting and packaging the electret wormwood melt-blown fabric.
4. The preparation method according to claim 3, wherein in the step 1), the weight ratio of the polypropylene melt-blown material to the electret material is (98.7-99.8): (0.2-1.3); in the step 3), the content of the wormwood extract in the wormwood finishing liquid is 0.1-5 wt%, and the balance is water; the particle diameter of the wormwood extract is less than 3 microns.
5. The method according to claim 3Characterized in that in the step 3), the air pressure of the aerosol generating device is 2-8bar, and the aerosol concentration is 0.5-5g/m3The amount of aerosol ejected is 2-15 g/s.m.
6. The preparation method according to claim 3, wherein in step 3), the nozzles of the aerosol generating device are horizontally arranged on one side or two sides of the melt-blown spinning fiber, so that the wormwood aerosol and the melt-blown spinning fiber form a vertical state, then the wormwood aerosol is contacted with the melt-blown spinning fiber in a molten state and embedded on the surface of the melt-blown spinning fiber, water is evaporated after the liquid particles are contacted, the rest wormwood extract component is also embedded on the surface of the melt-blown spinning fiber, and finally the wormwood aerosol is cooled and formed into a net.
7. The process of claim 6, wherein in step 3), the horizontal distance from the nozzle opening of the aerosol generating device to the melt-blown spun fiber is 5 to 20cm, and the vertical distance from the orifice of the die is 3 to 15 cm.
8. The production method according to claim 3, wherein in step 5), the electrostatic electret is a corona electret or a water friction electret; the voltage of the electrostatic electret is 15-50 kv; in the step 6), the gram weight of the electret wormwood sorting melt-blown fabric is 15-70g per square meter.
9. A medical mask characterized by comprising an inner layer, a filter core layer and an outer layer which are sequentially overlapped and sewn with each other, wherein the filter core layer is made of the wormwood finishing meltblown fabric according to claim 1 or 2.
10. An industrial filter characterized in that the industrial filter is the wormwood finishing meltblown fabric according to claim 6 or 7.
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